/* Explain: App-specific layout utilities and responsive adjustments. */
/* ---------- Header ---------- */
.qw-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.93);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
}

.qw-header.is-scrolled { box-shadow: var(--shadow-soft); }

.qw-header__inner { display: flex; align-items: center; gap: 1rem; min-height: 4.25rem; }

.qw-brand {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.08rem;
    color: var(--primary-color);
    letter-spacing: 0.01em;
}

.qw-brand__mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.25rem;
    height: 2.25rem;
    border-radius: 0.7rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #fff;
    font-size: 0.95rem;
}

.qw-brand__text span { color: var(--secondary-color); }

.qw-nav { display: none; align-items: center; gap: 1.35rem; margin-inline: auto; }

.qw-nav__link {
    position: relative;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--primary-color);
    background: none;
    border: none;
    padding: 0.4rem 0;
}

.qw-nav__link::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 2px;
    background: var(--accent-color);
    transform: scaleX(0);
    transition: transform 0.25s ease;
}

.qw-nav__link:hover::after { transform: scaleX(1); }

.qw-header__actions { display: flex; align-items: center; gap: 0.6rem; margin-left: auto; }
.qw-header__cta { display: none; }

.qw-burger {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.7rem;
    height: 2.7rem;
    border-radius: 0.7rem;
    border: 1px solid var(--border-color);
    background: #fff;
    color: var(--primary-color);
    font-size: 1.1rem;
}

/* ---------- Mobile menu ---------- */
.qw-mobile { border-top: 1px solid var(--border-color); background: #fff; }
.qw-mobile[hidden] { display: none; }
.qw-mobile__inner { display: flex; flex-direction: column; padding: 0.5rem 1.25rem 1.1rem; }

.qw-mobile__link {
    display: block;
    width: 100%;
    text-align: left;
    padding: 0.85rem 0.25rem;
    border: none;
    border-bottom: 1px solid var(--surface-2);
    background: none;
    font-weight: 600;
    color: var(--primary-color);
    font-size: 1rem;
}

/* ---------- Language switcher ---------- */
.lang-switch { position: relative; }

.lang-switch__btn {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.5rem 0.8rem;
    border-radius: 999px;
    border: 1px solid var(--border-color);
    background: #fff;
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.85rem;
}

.lang-switch__menu {
    position: absolute;
    right: 0;
    top: calc(100% + 0.5rem);
    min-width: 10rem;
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 0.85rem;
    box-shadow: var(--shadow-strong);
    padding: 0.4rem;
    list-style: none;
    margin: 0;
    z-index: 5;
}

.lang-switch__menu[hidden] { display: none; }

.lang-switch__menu button {
    display: block;
    width: 100%;
    text-align: left;
    padding: 0.55rem 0.7rem;
    border: none;
    background: none;
    border-radius: 0.55rem;
    font-weight: 600;
    color: var(--primary-color);
}

.lang-switch__menu button:hover { background: var(--surface-color); }
.lang-switch__menu button.is-active { color: var(--secondary-color); background: var(--accent-soft); }

/* ---------- Hero ---------- */
.qw-hero {
    position: relative;
    isolation: isolate;
    color: #fff;
    padding: clamp(3.5rem, 11vw, 7.5rem) 0 clamp(2.5rem, 7vw, 4.5rem);
    overflow: hidden;
}

.qw-hero__bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    z-index: -2;
}

.qw-hero__scrim {
    position: absolute;
    inset: 0;
    z-index: -1;
    background: linear-gradient(120deg, rgba(11, 37, 69, 0.95) 0%, rgba(11, 37, 69, 0.74) 45%, rgba(20, 184, 166, 0.58) 100%);
}

.qw-hero__inner { display: flex; flex-direction: column; align-items: flex-start; gap: 1.05rem; max-width: 800px; }
.qw-hero__title { color: #fff; font-size: clamp(2rem, 6vw, 3.5rem); line-height: 1.06; }
.qw-hero__sub { font-size: clamp(1rem, 2vw, 1.14rem); color: rgba(255, 255, 255, 0.92); line-height: 1.65; max-width: 640px; }

.qw-hero__search {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    width: 100%;
    max-width: 580px;
    padding: 0.4rem 0.4rem 0.4rem 1rem;
    background: rgba(255, 255, 255, 0.97);
    border-radius: 999px;
    box-shadow: var(--shadow-strong);
}

.qw-hero__search i { color: var(--text-muted); }

.qw-hero__search input {
    flex: 1;
    min-width: 0;
    border: none;
    background: transparent;
    padding: 0.55rem 0;
    color: var(--primary-color);
    outline: none;
    font-size: 0.95rem;
}

.qw-hero__actions { display: flex; flex-wrap: wrap; gap: 0.7rem; }

.qw-stats { display: flex; flex-wrap: wrap; gap: 1.5rem; margin-top: 0.75rem; }
.qw-stat { display: flex; flex-direction: column; }
.qw-stat strong { font-family: var(--font-heading); font-size: 1.8rem; color: #fff; line-height: 1; }
.qw-stat span { font-size: 0.82rem; color: rgba(255, 255, 255, 0.82); margin-top: 0.3rem; }

/* ---------- Sections ---------- */
.qw-section { padding: clamp(3rem, 7vw, 5.25rem) 0; }

.qw-section__head {
    max-width: 680px;
    margin-bottom: 2.1rem;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.qw-section__head h2 { font-size: clamp(1.6rem, 4vw, 2.35rem); }
.qw-section__head p { color: var(--text-muted); font-size: 1rem; line-height: 1.7; }

.qw-routes { background: var(--surface-color); }
.qw-dest { background: #fff; }
.qw-features { background: linear-gradient(180deg, #fff, var(--surface-2)); }

/* ---------- Route planner ---------- */
.qw-planner {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: clamp(1.1rem, 3vw, 1.75rem);
    box-shadow: var(--shadow-soft);
}

.qw-planner__fields { display: grid; gap: 0.9rem; grid-template-columns: 1fr; align-items: end; }

.qw-field {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    font-size: 0.76rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.qw-field select {
    padding: 0.7rem 0.9rem;
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    background: var(--surface-color);
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.95rem;
    text-transform: none;
    letter-spacing: 0;
}

.qw-note { margin-top: 0.9rem; font-size: 0.79rem; color: var(--text-muted); line-height: 1.5; }
.qw-route-results { margin-top: 1.6rem; }
.qw-route-results h3 { font-size: 1.05rem; margin-bottom: 0.9rem; }
.qw-route-list { display: grid; gap: 0.75rem; }

.qw-empty {
    color: var(--text-muted);
    font-size: 0.92rem;
    line-height: 1.6;
    padding: 1rem;
    background: var(--surface-color);
    border-radius: var(--radius-md);
    border: 1px dashed var(--border-color);
}

/* ---------- Grids ---------- */
.qw-dest__grid { display: grid; grid-template-columns: 1fr; gap: 1.5rem; }
.qw-features__grid { display: grid; grid-template-columns: 1fr; gap: 1.5rem; }

/* ---------- Footer ---------- */
.qw-footer { background: var(--primary-color); color: rgba(255, 255, 255, 0.85); padding: 3rem 0 1.5rem; margin-top: 0; }
.qw-footer__inner { display: grid; gap: 2rem; grid-template-columns: 1fr; }

.qw-footer__brand strong {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    color: #fff;
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
}

.qw-footer__brand strong span { color: var(--accent-color); }
.qw-footer__brand p { font-size: 0.9rem; line-height: 1.65; max-width: 430px; margin-top: 0.75rem; }

.qw-footer__col { display: flex; flex-direction: column; gap: 0.6rem; }
.qw-footer__col h4 { color: #fff; font-size: 0.95rem; }

.qw-footer__col a,
.qw-footer__link {
    color: rgba(255, 255, 255, 0.82);
    font-size: 0.92rem;
    background: none;
    border: none;
    padding: 0;
    text-align: left;
    transition: color 0.2s ease;
}

.qw-footer__col a:hover,
.qw-footer__link:hover { color: var(--accent-color); }

.qw-footer__bottom {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1.5rem;
    justify-content: space-between;
    margin-top: 2.5rem;
    padding-top: 1.25rem;
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    font-size: 0.79rem;
    color: rgba(255, 255, 255, 0.7);
}

/* ---------- Responsive ---------- */
@media (min-width: 640px) {
    .qw-planner__fields { grid-template-columns: 1fr 1fr auto; }
    .qw-dest__grid { grid-template-columns: repeat(2, 1fr); }
    .qw-features__grid { grid-template-columns: repeat(3, 1fr); }
    .qw-footer__inner { grid-template-columns: 2fr 1fr 1fr; }
}

@media (min-width: 960px) {
    .qw-nav { display: flex; }
    .qw-burger { display: none; }
    .qw-header__cta { display: inline-flex; }
}

@media (max-width: 480px) {
    .assistant-fab { right: 1rem; bottom: 1rem; }
    .assistant-panel { right: 0.5rem; left: 0.5rem; bottom: 0.75rem; width: auto; }
}